The pitch and the pseudo angle of pitch of a closed piece of (k+1)-dimensional ruled surface in $R^n_v$

Abstract

In this paper, we define the closed piece of ruled surface, the pitch and the pseudo angle of pitch of a closed piece of ruled surface and calculate these values in Minkowski space $R^n_v =(R^n,Sigma^v_{i=1}dx_i + Sigma^n_{i=v+1}dx_i)$